31U 
Bulletin Ihiitcd States National J/useum 
Boily long, sleml«T, comiMesscil ; snout ])oiute»l, its length equal to 
diameter of orhit or to inter<»rl»ital spare; month almost horizontal, its 
cleft extending to vertical from anterior edge of orhit; lips thin; teeth 
4-4, strong, slightly hooked, the hook barely evident on lower tooth; 
three npper teeth with a grooved grinding surface; gill-rakers short, 
I»yramidal, and far apart; alimentary canal short; peritoneum silvery; 
lateral line complete, decnrved to a ]»oint in a vertical midway between 
pectoral and ventral fins, from which it extends in a straight line a little 
below middle of body to the caudal; fins all very high and i»ointed; 
dorsal inserted directly over origin of vontrals, falcate when depressed, 
its first ray longest; anal similar in shajie, inserted at a point J the dis- 
tance from tip of snout to base of cauilal; ventrals extending to vent, tip 
of pectoral reaching ventrals; caudal deeply forked. Color silvery; a 
narrow, dark median band extending down from occiput to base of caudal ; 
dorsal scales with fine dots Avhich give their edges a dusky color. 
One specimen known, careful measurements of which are given: 
Length of body in millimeters 74 ; depth of body, expressed in hundredths 
of length, 25; depth of caudal peduncle 11; length of head 25; width of 
interorbital space 7; length of snout 7; diameter of orbit 7; distance 
from snout to dorsal fin 47 ; height of longest dorsal rays 26 ; distance from 
snout to anal fin 67; height of longest anal rays 21; distance from anal 
to caudal fin 27; length of caudal fin 34; length of pectoral tin 22; dis- 
tance from snout to ventral fin 62; length of ventral fin 21. (Jordan iV 
Snyder.) 
Only the type known (No. 6152, L. S. .Jr. T’niv. Mus.) collected by ,T. O, 
Snyder in Laguna de Chapala, near Ocotlau, Jalisco, Mexico. 
(Named for the type locality.) 
Falcula chapalce, & Snyoeu, Bull. U. S. Fish Com. 1S99 (1900), 121, Laguna de 
Chapala, Mexico. 
Page 311. Before Agosia nuhUa (Girard), insert the following: 
.514 (a). .tbOSU KLA.M.VTHK>'.SIS. Everniauii i Meek. 
Head 4; depth 4.4; eye 44 in head; snout 34; I). I, 8; A. I, scales 
about 14-78-10 (average, 73 in 49 specimens). 
Body robust, subcylindrical, back somewhat elevated ; snout rather long, 
mouth inferior, little oblique, the lower jaw included; maxillary not 
reaching front of orbit; npper lip without frenuin; barbel present, but 
small. Lateral line incomplete, interrupted in many places, about 30 
pores developeil. Origin of dorsal fin midway between front of jmpil and 
base of caudal fin ; pectoral rather short, reaching about three-fourths the 
distance to base of ventrals; ventrals reaching vent; anal large, its 
longi-st ray 14 in head; caudal widely forked. 
Color in .alcohol: fHivaceous, mottled and blotched with darker on back 
and side; under parts pale; an obscure pale streak from eye to base of 
caudal fin, below which is a broad dark band; dorsal, pectoral, and caudal 
dusky; other fins plain; a black blotch at base of caudal. 
An examination of 48 specimens shows all the important characters to 
